Update git submodules

* Update docs/submodules/aaf/certservice.git from branch 'master'
  to b8de3b83a9fced234c2ee240c77f59a3e168e8fb
  - Merge "Fix README.md"
  - Fix README.md
    
    Issue-ID: AAF-997
    Signed-off-by: Zebek Bogumil <bogumil.zebek@nokia.com>
    Change-Id: I8da222f0c4026fbaa7426c9a0831140c7823b897
    
1 file changed